Mechanisms through which contact can reduce prejudice:
Allport’s scope conditions:
How much does this cow weigh?
Does contact reduce racial prejudice? If we just consider experimental studies, the answer is “yes,” but the effects are quite moderate.
For studies published between 2007-2019 (N=9), the effect works out to a movement of around 3-4 points on a 100 point “feeling thermometer”.
For comparison, between 1984 and 2016, the average feeling thermometer responses in relation to gay people went from 30.9 (cold) to 60.7 (warm).
In other words, from the (limited experimental) literature, it seems that contact has a small but statistically significant effect in reducing prejudice.
But that’s not the whole story…
Publication bias occurs when the direction or strength of a study’s outcome influences whether it is published or not. When academic journals are reluctant to publish research papers that report statistically insignificant treatment effects, studies that produce weak or null effects may remain invisible to the academic community.
Why is this a problem especially for small studies? Because small studies are more likely to uncover extreme effects!
Suppose we drew 20 samples with N = 20 (10 control, 10 treatment):
But now what happens if only the statistically significant studies get published, while the rest get put in a file drawer?
Notice that this is not a problem with large, well-powered studies:
In fact, if we
focus only on the large studies – or else try to extrapolate the
relationship between effect size and standard error to the case where
the s.e. approaches zero – we see very little evidence that contact
reduces prejudicial attitudes (although we do see that contact
can reduce discriminatory behavior).
We can assess studies not only on sample size, but also on how well the intervention meets the conditions for positive contact.
Was the contact induced by the experiment co-operative, egalitarian and positive? Did it have the support of legal or institutional authorities?
Did it provide opportunities to develop knowledge of the out-group, decrease anxiety around out-group encounters, and increase empathy and perspective-taking?
How would you assess Mousa’s study on these criteria?
How well do the interventions in following studies fit the criteria for “good” contact?
This paper investigates the consequences of intergroup interactions by
examining whether attitudes and behaviors change when people of
different races are randomly assigned to live together at the start of
their first year of college at the University of California, Los Angeles
(UCLA). We choose this environment because some students are assigned
roommates randomly, thus allowing us to identify causal effects. We find
that white students who are randomly assigned African American roommates
are significantly more likely to endorse affirmative action (taking race
into account in the University admissions process) and have personal
contact with members of other ethnic groups after their first
year.
This article explores the causal effect of personal contact with ethnic
minorities on majority members’ views on immigration, immigrants’ work
ethics, and support for lower social assistance benefits to immigrants
than to natives. Exogenous variation in personal contact is obtained by
randomising soldiers into different rooms during the 8-week basic
training period for conscripts in the Norwegian Army’s North Brigade.
During these 8 weeks, soldiers basically spend all their time with their
roommates and fellow conscripts in the platoon. A normal day of boot
camp starts with activities within the room, such as cleaning and
preparing the room before inspection. Working hours are intense, usually
10–15 h a day. In addition, soldiers are expected to prepare their
individual gear and equipment for the following day after duty ends.
This leaves the soldiers with few opportunities for personal chores and
socializing outside their own room. The room is also important since it
usually constitutes a squad within a platoon in the company. Thus,
sharing room during the training period constitutes intense treatment in
the form of personal contact. The study finds a substantive positive
effect of contact on views on immigrants’ work ethics, but small and
insignificant effects on support for immigrants having the same rights
to social assistance as Norwegians, as well as on views on whether
immigration makes Norway a better place in which to live.
We conducted a field experiment—the Urban Youth Vocational Training
(UYVT) project—to test whether sustained contact in an educational
setting can improve communal relations in a conflict-prone environment.
The UYVT intervention brought together a random sample of Christian and
Muslim young men from disadvantaged neighborhoods in Kaduna, Nigeria, a
city that has experienced repeated episodes of severe religious
violence, for sixteen weeks of computer training.
The goal of our study is to make inferences about the effects of intergroup contact on individuals in conflict zones, not simply people who volunteer for peacebuilding programs. We therefore randomly selected study participants from among the residents of the poorest and most conflict-prone neighborhoods in Kaduna. Since it is typically young men who carry out violence, we restricted our sample to men aged 18 to 25.
The UYVT training program structured participant interaction in a basic computer-skills class under the supervision of three experienced teachers, one Muslim and two Christian. Homogeneous classes were taught exclusively by a teacher from the same religion as the students. There were 30 course sections: 20 religiously heterogeneous and 10 homogeneous. Each section met twice weekly for a total of four hours per week over sixteen weeks. Students remained within the same classroom working with the same partner on a shared lap-top for the duration of the course. The curriculum focused heavily on cooperative activities performed jointly by learning partners during each of 29 class sessions. Course topics included basic knowledge of MS Windows, MS Office, and introductions to internet resources such as email, Skype, and free online educational content. Since over 40% of the sample had never previously used a computer, and two-thirds had previously used a computer less than once per week, this content was highly valued.
Class sessions were organized to maximize assigned partner interaction through fun, hands-on learning ac- tivities. At the beginning of each session, teachers lectured for approximately 30 minutes. The remain- der of class time was devoted to partner work, with guidance from teachers. Partners designed flyers that could be used to advertise computer courses, computed FIFA and UEFA soccer team and country rankings, re- searched the West African Ebola crisis, and produced presentations on countries they would like to visit. To avoid reporting bias, students and instructors were not informed about the main purpose of our study, but instead experienced UYVT as an educational empower- ment program targeting disadvantaged communities in Kaduna. By design, no component of the curriculum involved explicit prejudice-reduction or anti-violence messaging.
To assess the impact of our intervention, we randomized (1) recruitment into the computer training program, (2) assignment to a religiously homogeneous or heterogeneous classroom, and (3) assignment to a coreligious or non-coreligious learning partner within the classroom. We measured prejudice through survey-based assessments of agreement with negative and positive stereotypes, and measured discrimination through two behavioral games (e.g. donating money to an anonymous outgroup member) embedded in our post-treatment survey.
We find that though prejudice is resistant to change, intergroup contact can reduce discriminatory behavior: After the end of the training course, subjects assigned to heterogeneous classes discriminated significantly less against out-group members than subjects assigned to homogeneous classes. This suggests contact can change behavior even without attendant changes in entrenched attitudes.
We also present evidence suggesting a striking explanation for why
subjects in mixed classes discriminate less than subjects in homogeneous
classes. Mixed-class subjects do not actually discriminate much less
after the end of the course than a third group of randomly assigned
non-UYVT study participants. However, subjects assigned to homogeneous
classes discriminate significantly more than these nonparticipants. This
suggests opportunities for in-group bonding can heighten discrimination,
and programs for mixed groups may be desirable not simply because they
expose participants to out-group individuals, but because they reduce
the time spent with in-group members. This insight has eluded much of
the literature on social contact interventions, which focuses on
comparing individuals in mixed and nonmixed contact environments and
commonly neglects comparisons to subjects not exposed to the
intervention. Our research design enables comparison of both contact
treatments with non-UYVT participants.
The experiments we present study outreach from canvassers for
community-based organizations who reached out to have conversations with
voters in person and over the phone. Canvassers approached members of
the general population by knocking on individuals’ doors or calling them
on the phone unannounced. Canvassers first asked individuals their view
on immigration and what considerations were on each side of the issue
for them.
Next, canvassers engaged in the strategy we study: non-judgmentally exchanging narratives. For example, in Experiment 1, which targeted attitudes toward unauthorized immigrants, canvassers asked voteres about their own previous experiences with immigrants. This was intended to help elicit “voters’ own experiences that relate to the undocumented immigrant experience.” Then canvassers asked individuals to tell a story about “a time when someone showed [them] compassion when [they] really needed it”.
Canvassers also provided narratives about immigrants they knew or, if they were immigrants, about themselves. The canvassers’ goal was to encourage individuals to engage in perspective-taking (that is, considering outgroup members’ point of view) and to activate (that is, increasing the salience of) inclusionary values.
Canvassers engaged in this exchange non-judgmentally by explicitly expressing interest in understanding individuals’ views and experiences, while also not expressing any negative judgments toward any statements hostile to the outgroup individuals made. The canvass training likewise instructed canvassers to “make it clear [to voters] we’re not there to judge them and we’re curious about their honest experience, whatever it is.”
During this exchange of narratives, canvassers asked questions that sought to prompt individuals to draw their own implications from the narratives. Canvassers’ goal was for this non-judgmental exchange of narratives to end with individuals self- generating and explicitly stating aloud implications of the narratives that ran contrary to their previously stated exclusionary attitudes. Qualitative debriefs with the canvassers indicate that such “self-persuasion” appeared to be common.
Finally, canvassers attempted to address common misconceptions, discussed why they were supportive of inclusionary policies, and asked individuals to describe whether and why the conversation changed their views. The conversations lasted around 10 minutes on average.
The study was conducted in 3 locations: central Tennessee; Fresno, California; and Orange County, California in areas that were expected to have higher concentrations of individuals with exclusionary attitudes toward unauthorized immigrants. The canvassing took place during the run-up to the 2018 US midterm elections (August–October, 2018), in which immigration issues featured prominently, such as when US President Donald Trump repeatedly warned voters about a caravan of unauthorized immigrants approaching the US–Mexico border.
The canvassers had no experience conducting in-person conversations to reduce exclusionary attitudes prior to the project, had an average age of 25, and were ethnically diverse, with 54% self-identifying as Latino.
The experiment began by recruiting registered voters (n = 217.600) via mail for an ostensibly unrelated online baseline survey, presented as the first in a series of surveys not specifically about immigration and which made no reference to any potential canvassing. We gathered voters’ contact information to recruit them to the survey from the public lists of registered voters. Following the canvassing intervention, we fielded follow-up surveys that began 4 days (n = 1.578), 30 days (n = 1,508), and 3–6 months (n = 1384) after the conversations. The surveys included 6 items measuring support for policies related to immigrants and 7 items capturing anti-immigrant prejudice.
The experiment yielded two main findings: First, interpersonal
conversations that deployed the non-judgmental exchange of narratives
reduced exclusionary attitudes toward unauthorized immigrants—a widely
discussed, openly stigmatized group, attitudes toward whom have been
deemed strong and resistant to change. Second, these effects lasted for
at least 4.5 months in a competitive political context (the immediate
run-up to the 2018 US midterm elections) in which elites, including US
President Donald Trump, expressed contrary policy arguments and open
hostility toward the group; and these effects persisted even among
self-identified Republicans.